11223121321001 has 4 divisors (see below), whose sum is σ = 11326085736900. Its totient is φ = 11120156905104.

The previous prime is 11223121320899. The next prime is 11223121321033. The reversal of 11223121321001 is 10012312132211.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9241569600025 + 1981551720976 = 3039995^2 + 1407676^2 .

It is a cyclic number.

It is not a de Polignac number, because 11223121321001 - 2²⁶ = 11223054212137 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11223121321081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51482207786 + ... + 51482208003.

It is an arithmetic number, because the mean of its divisors is an integer number (2831521434225).

Almost surely, 2^{11223121321001} is an apocalyptic number.

It is an amenable number.

11223121321001 is a deficient number, since it is larger than the sum of its proper divisors (102964415899).

11223121321001 is a wasteful number, since it uses less digits than its factorization.

11223121321001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102964415898.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 11223121321001 its reverse (10012312132211), we get a palindrome (21235433453212).

The spelling of 11223121321001 in words is "eleven trillion, two hundred twenty-three billion, one hundred twenty-one million, three hundred twenty-one thousand, one".